At least three people were killed on Wednesday in a shooting at the University of Nevada, Las Vegas.

The suspect in the shooting is dead as well, authorities said, according to ABC News.

One more victim is in critical condition at a hospital, according to police.

UNLV said shots were reported at Beam Hall, home to the business school, as well as the student union, which is next door.

The shooting was reported at 11:45 a.m. local time and police responded and "engaged" the suspect, authorities said.

A ground stop was initiated at Las Vegas' Harry Reid International Airport on Wednesday due to the close proximity of the airport runways to UNLV, and because of the police response to the shooting, which included helicopters, according to an official briefed on the incident. The ground stop was mostly lifted several hours later.

Authorities have confirmed there is no further threat to the university, which has been closed for the rest of the day.

Police have not yet released the identity of the shooter or the motive for the shooting.